Central Processing Unit 1. The Microchip containing the Arithmetic Logic Unit, Decoder, registers, etc. that decodes and executes machine-level commands inside the Computer System. 2. The set of circuit boards of a mainframe containing these elements. 3. slang The system case containing the above. CPU's are classified by their instruction set width...Found on http://www.encyclo.co.uk/local/20091

Central Processing Unit - this is the electronic circuitry at the heart of a computer that executes (very rapidly!) a series of simple steps of reading, manipulating and writing information to and from the computer's RAM memory and input/output devices
Found on http://www.archivemag.co.uk/

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